The valve is inserted through the backside of the wheel and clamped from the front with a nut and washer
A metal, or metal and rubber, tubular stem containing a valve core and cap. The mounting end may have a base with a fitting designed for mounting on a pneumatic tire, inner tube, or tire rim, to permit and retain inflation or permit deflation. The mounting end may be internally threaded for adaptability to a valve spud or may be provided with cure-on or clamp in features. The other end is externally threaded to accommodate a valve cap, and internally threaded to accommodate the valve core.
Dept. of the Army 
Dept. of the Air Force 
U.s. Marine Corps 
Dept. of the Navy 
U.s. Postal Service - Procurement and Supplies Dept. Classification: Other taps, cocks, valves, etc., nesoi
NSN 6620-01-535-6925
NSN 6110-01-418-5541
NSN 5975-01-649-8168
NSN 5998-00-277-7552
NSN 5998-01-315-9122
NSN 6620-00-155-2608
NSN 6610-01-467-7068
NSN 6685-00-388-6763
NSN 6620-01-505-7921
NSN 5965-00-139-2809
NSN 5965-00-470-9521
NSN 6145-01-474-1252